Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor uncovers the Rutan’s deadly relay
S15E4
·
Horror of Fang Rock Part 4
To
Rutan reveals invasion plan to Doctor
S15E4
·
Horror of Fang Rock Part 4
Why These Connect
The narrative assertion
"The Doctor's discovery of the power relay (beacon component) leads to the Rutan revealing its plan to use the lighthouse's power to signal its mother ship during their confrontation."
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.